Molecular Physics | Thermodynamics Answers

A box of volume 1 cm3

contains

5.2×10^21

electrons. Calculate their Fermi

momentum and Fermi energy.

Take: me=9.1×10^(–28) g

mn=1.67×10^(–24) g

h=6.62×10^(–27) ergs

Two separate containers filled with different gases. If these gases are allowed to mix,

obtain an expression for entropy of mixing per mole of the mixture. Does the entropy

decreases in the process of mixing of two gases?

Volume of one drop = 3.0*10-5mm3

Diameter of oil patch=0.2m.

Determine the size of the molecule

Describe how the same information can be used to determine the extent of spillage of the know volume of the same oil at the sea?

A column of air 26cm long is trapped by a Mercury thread 5 cm.whenthe tube is inverted the air column now is 28cm. What is the atmospheric pressure

Sketch a variation of pressure with distance on a graph starting from low pressure to high pressure as the distance goes further

An object of density 300kgm-3 and volume of 0.001m3 is immersed in a water of density 200kgm-3, take g to be equal to 9.8m/sec2.determine;

(a):the weight in air

(b):the weight inside the water

(c):the upward force exerted by the water

(d):relative density

why the temperature of hot water decreased when cold water was added

A large beaker is filled with ice cold water and is placed in a larger vessel containing a mixture of ice and water at zero degree temperature. A lump of aluminum weighing 120g initially cooled to -70C is then suspended inside the beaker. Explain why ice is formed on the aluminum lumps and not on the walls of the beaker.

Calculate the maximum weight of ice which can form on the aluminum = 9.10 x 10^2 Jkg^-1k^-1

estimate the number of molecules in 3.00m^3 of air by assuming that it has a density of 1.21kg/m^3 and that is entirely composed of nitrogen molecules

A bimetallic strip is usable as a thermometer because of